This TruePower Professional Eraser, Etching Airbrush Gun is a versatile instrument that can erase color errors and act as an etching tool. It is used by hobbyists and manufacturers to clean jewelry and fine parts, remove discoloration, rust, corrosion, etch glass, or cut monograms. It is issued by lithographers to highlight half tones and erase defects without marring the surface or leaving a smudge.